Western Cape police confirmed that the two explosions occurred just after 23:00 on Thursday night.
“Cases of malicious damage to property were opened for investigation, no arrest as yet,” said Western Cape police spokesperson Captain Frederick van Wyk.
The blasts went off outside the Woolworths branch in Kromboom Road and AutoBelgravia in Belgravia Road, Athlone.
“We can confirm damage to a window in our Kromboom store. There were no injuries reported,” Woolworths said in a statement to News24.
“We are currently investigating the cause of the incident with the relevant authorities,” it added.
The City of Cape Town’s fire and rescue services told Eyewitness News they were called to Belgravia Road after an apparent explosion. They found a car was on fire, and bystanders said it had exploded.
eNCA reporter Lester Kiewit tweeted from the scene that it is unclear whether Woolworths was the target, as there was more damage to Vee’s Videos and Auto Belgravia.
He added that there were similar pipe-bombings at two auto dealerships in Athlone in August last year.